feat: export TransitionOptions interface and getIonPageElement (#28140)

Issue number: resolves #28137

---------

Changes according to [this
comment](https://github.com/ionic-team/ionic-framework/issues/28137#issuecomment-1710283096)

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

@liamdebeasi Sorry for replacing the previous PR. I only copied the main
branch to my fork so I couldn't rebase properly. I am unfortunately not
extremely familiar with Github.

---------

Co-authored-by: Philipp Heuer <philipp@studysmarter.de>
Co-authored-by: Liam DeBeasi <liamdebeasi@users.noreply.github.com>

packages/vue/src/index.ts

@@ -47,6 +47,7 @@ export {
   isPlatform,
   menuController,
   getTimeGivenProgression,
+  getIonPageElement,
 
   // TYPES
   Animation,
@@ -123,4 +124,5 @@ export {
   ToastLayout,
   ToggleChangeEventDetail,
   ToggleCustomEvent,
+  TransitionOptions,
 } from "@ionic/core/components";